/*
 * marketsim-eclipsetrader
 *
 * Copyright (C) 2008-2011 Steve Phelps and John Cartlidge
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 3 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 */
/*
 *  (C) Victria Ltd. 2007
 */
package victria.marketsim.eclipsetrader;

import java.util.concurrent.ConcurrentLinkedQueue;

import org.apache.log4j.Logger;

import victria.marketsim.eclipsetrader.event.VisualisationEvent;
import victria.marketsim.eclipsetrader.event.VisualisationEventListener;

public abstract class AbstractController {

	static Logger logger = Logger.getLogger(AbstractController.class);

	protected ConcurrentLinkedQueue<VisualisationEventListener> listeners 
		= new ConcurrentLinkedQueue<VisualisationEventListener>();

	public void addListener(VisualisationEventListener listener) {
		logger.debug("Adding listener " + listener);
		listeners.add(listener);
	}

	public void removeListener(VisualisationEventListener listener) {
		logger.debug("Removing listener " + listener);
		listeners.remove(listener);
	}

	public void fireEvent(VisualisationEvent event) {
		if (logger.isDebugEnabled()) 
				logger.debug("Firing event " + event + ".. ");
		try {
			for (VisualisationEventListener listener : listeners) {
				listener.eventOccurred(event);
			}
		} catch (Exception e) {
			logger.error(e);
			e.printStackTrace();
		}
	}
}
